I need to read serveral PI points values at one call. I need to read the values for certain tags only and not all the points. However, I keep on getting an exceptioon that 'tag' attriubte is duplicated.
Below is the code I'm using.
Dim myPIserver As PIServer = Nothing
Dim startTime As String = ""
Dim endTime As String = ""
Dim fltrExp As String = ""
Dim filtered As Boolean = True
'connection to PI server
If myPIserver Is Nothing Then
myPIserver = New PIServers().DefaultPIServer
End If
'Query for PI Point
Dim tagMasks() As String = {"tag1", "tag2", "tag3"}
Dim ptQuery As New List(Of PIPointQuery)()
Dim tags = ""
For Each item As String In tagMasks
ptQuery.Add(New PIPointQuery(attributeName:=PICommonPointAttributes.Tag, AFSearchOperator.Equal, item))
Next
' Dim myPointList As New PIPointList(OSIsoft.AF.PI.PIPoint.FindPIPoints(myPIserver, ptQuery))
Dim myPointList As New PIPointList(PIPoint.FindPIPoints(myPIserver, ptQuery))
startTime = "*-7d"
endTime = "*"
'Retrieve events using PIPointList.RecordedValues into list 'myAFvalues'
Dim myAFvalues As List(Of AFValues) = myPointList.RecordedValues(New AFTimeRange(startTime, endTime), AFBoundaryType.Inside, "", filtered, New PIPagingConfiguration(PIPageType.EventCount, 10000)).ToList()
